Electrostatic imaging process

Abstract

Disclosed is a process for generating images which comprises (1) generating an electrostatic latent image on an imaging member in an imaging apparatus; (2) developing the latent image; and (3) transferring the developed image to a recording sheet which comprises (a) a substrate; (b) a coating on the substrate which comprises (i) a polymeric binder selected from the group consisting of (A) copolymers of styrene and at least one other monomer; (B) copolymers of acrylic monomers and at least one other monomer; and (C) mixtures thereof; and (ii) an additive having a melting point of more than about 65° C. and a boiling point of more than about 150° C. and selected from the group consisting of (A) norbornane compounds; (B) phenyl compounds; and (C) mixtures thereof; (c) an optional filler; (d) an optional antistatic agent; and (e) an optional biocide. In a preferred embodiment, the latent image is developed with a liquid developer.

What is claimed is: 
     
       1. A process for generating images which comprises (1) generating an electrostatic latent image on an imaging member in an imaging apparatus; (2) developing the latent image; and (3) transferring the developed image to a recording sheet which comprises (a) a substrate; (b) an image receiving coating which comprises (i) a polymeric binder selected from the group consisting of (A) copolymers of styrene and at least one other monomer; (B) copolymers of acrylic monomers and at least one other monomer; and (C) mixtures thereof; and (ii) an additive having a melting point of more than about 65° C. and a boiling point of more than about 150° C. and selected from the group consisting of (A) norbornane compounds; (B) phenyl compounds; and (C) mixtures thereof; (c) an optional filler; (d) an optional antistatic agent; and (e) an optional biocide. 
     
     
       2. A process according to claim 1 wherein the electrostatic latent image is developed with a toner which comprises a colorant and a resin selected from the group consisting of (A) copolymers of styrene and at least one other monomer; (B) copolymers of acrylic monomers and at least one other monomer; and (C) mixtures thereof. 
     
     
       3. A process according to claim 2 wherein the toner resin contains the same monomers contained in the binder on the recording sheet. 
     
     
       4. A process according to claim 1 wherein the polymeric binder contained in the coating on the substrate is a copolymer of styrene and at least one other monomer. 
     
     
       5. A process according to claim 1 wherein the polymeric binder contained in the image receiving coating on the substrate is a copolymer containing acrylic monomers and at least one other monomer. 
     
     
       6. A process according to claim 1 wherein the polymeric binder contained in the image receiving coating on the substrate is selected from the group consisting of styrene-butadiene copolymers, styrene-isoprene copolymers, styrene-alkyl methacrylate copolymers, styrene-aryl methacrylate copolymers, styrene-allyl alcohol copolymers, styrene-maleic anhydride copolymers, and mixtures thereof. 
     
     
       7. A process according to claim 1 wherein the binder and the additive material are present in the image receiving coating on the recording sheet in relative amounts of from about 10 percent by weight binder and about 90 percent by weight additive material to about 99 percent by weight binder and about 1 percent by weight additive material. 
     
     
       8. A process according to claim 1 wherein the electrostatic latent image is developed with a liquid developer. 
     
     
       9. A process according to claim 1 wherein the recording sheet substrate is transparent. 
     
     
       10. A process according to claim 1 wherein the recording sheet substrate is paper. 
     
     
       11. A process according to claim 1 wherein the additive contained in the image receiving coating on the substrate is a norbornane compound. 
     
     
       12. A process according to claim 1 wherein the additive contained in the image receiving coating on the substrate is of the general formula ##STR10## wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , and R 12  each, independently of the others, are selected from the group consisting of hydrogen atoms, alkyl groups, substituted alkyl groups, aryl groups, substituted aryl groups, arylalkyl groups, substituted arylalkyl groups, hydroxy groups, amine groups, imine groups, ammonium groups, pyridine groups, pyridinium groups, ether groups, aldehyde groups, ketone groups, ester groups, amide groups, carboxylic acid groups, carbonyl groups, thiocarbonyl groups, sulfate groups, sulfonate groups, sulfide groups, sulfoxide groups, phosphine groups, phosphonium groups, phosphate groups, cyano groups, nitrile groups, mercapto groups, nitroso groups, halogen atoms, nitro groups, sulfone groups, acyl groups, acid anhydride groups, and azide groups, wherein two or more of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , and R 12  can be joined together to form a ring, and wherein double bonds may exist between ring carbon atoms and atoms in R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , and R 12 . 
     
     
       13. A process according to claim 1 wherein the additive contained in the image receiving coating on the substrate is selected from the group consisting of norbornane, 2-norbornanone, norborneol, isoborneol, cis-5-norbornene-endo-2,3-dicarboxylic anhydride, exo-2,3-epoxy norbornane, camphor, camphor carboxylic acid, camphorquinone, camphorquinone-3-oxime, 10-camphorsulfonic acid, 3,9-dibromo camphor, 9,10-dibromo camphor, and mixtures thereof. 
     
     
       14. A process according to claim 1 wherein the additive contained in the image receiving coating on the substrate is of the general formula ##STR11## wherein R 1 , R 2 , R 3 , R 4 , R 5 , and R 6  each, independently of the others, are selected from the group consisting of hydrogen atoms, alkyl groups, substituted alkyl groups, aryl groups, substituted aryl groups, arylalkyl groups, substituted arylalkyl groups, hydroxy groups, amine groups, imine groups, ammonium groups, pyridine groups, pyridinium groups, ether groups, aldehyde groups, ketone groups, ester groups, amide groups, carboxylic acid groups, carbonyl groups, thiocarbonyl groups, sulfate groups, sulfonate groups, sulfide groups, sulfoxide groups, phosphine groups, phosphonium groups, phosphate groups, cyano groups, nitrile groups, mercapto groups, nitroso groups, halogen atoms, nitro groups, sulfone groups, acyl groups, acid anhydride groups, and azide groups, wherein two or more of R 1 , R 2 , R 3 , R 4 , R 5 , and R 6  can be joined together to form a ring, and wherein double bonds may exist between ring carbon atoms and atoms in R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 . 
     
     
       15. A process according to claim 1 wherein the additive contained in the image receiving coating on the substrate is selected from the group consisting of 4-vinyl biphenyl, 1,4-diphenyl-1,3-butadiene, 4,4'-dimethoxy biphenyl, 4,4'-dimethyl biphenyl, 4-biphenyl acetic acid, (6) biphenylene, 2-biphenylene carboxylic acid, 2-acetyl biphenylene, N,N'-diphenyl benzidine, diphenyl fulvene, diphenyl cyclopropenone, 2,3-diphenyl-1-indenone, 4,4'-diphenyl-2,2'-dipyridyl, 2,5-dimethyl-3,4-diphenyl cyclopentadienone dimer, α,α'-(2,2-dimethyl-1,3-dioxalane-4,5-diyl) bis(diphenyl-methanol), [2.2] paracyclophane, 1,4,5,8,9-pentamethyl carbazole, 1,1,1-tris (3-methoxy phenyl) phosphine, 3,3,3-tris (4-chlorophenyl) propionic acid, 3,3,3-tris (4-chlorophenyl) propionitrile, tris (4-bromophenyl) amine, dodecahydro triphenylene, triphenylamine, 2,4,6-triphenylaniline, 1,2,3-triphenylbenzene, 1,3,5-triphenylbenzene, triphenylene, 2,4,5-tripheylimadazole, triphenylmethane, triphenylmethanol, triphenylmethane sulfenamide, 3,3,3-triphenyl propionic acid, triphenyl phosphine oxide, 2,4,6-triphenoxy-1,3,5-triazine, triphenyl acetic acid, 2,2,2-triphenyl acetophenone, 1,2,3,5-tetraphenylbenzene, 1,1,4,4-tetraphenyl-1,3-butadiene, 1,2,3,4-tetraphenyl-1,3-cyclopentadiene, tetraphenyl cyclopentadienone, tetraphenylethylene, 1,2,4,5-tetraphenyl-1,5-pentanedione, 1,2,3,4,5-pentaphenyl-1,3-cyclopentadiene, and mixtures thereof. 
     
     
       16. A process according to claim 1 wherein the additive contained in the image receiving coating on the substrate is selected from the group consisting of naphthalene, 2-amino naphthalene, 1-amino-4-bromo-naphthalene, 1-amino-4-chloro-naphthalene, 2-naphthalene methanol, 2-methoxy naphthalene, 2-methoxy-1-naphthaldehyde, 1,3-dinitro naphthalene, 1,5-dinitro naphthalene, 1,8-dinitro naphthalene, 1,5-dimethyl naphthalene, 2,3-dimethyl naphthalene, 2,6-dimethyl naphthalene, 2,7-dimethyl naphthalene, 2,6-dimethoxy naphthalene, 2,7-dimethoxy naphthalene, dimethyl-2,6-naphthalene dicarboxylate, 2-hydroxy-1-naphthaldehyde, naphthoic acid, 1-hydroxy-2-naphthoic acid, 2-hydroxy-1-naphthoic acid, 3-hydroxy-2-naphthoic acid, 2-ethoxy-1-naphthoic acid, acenaphthene, acenaphthylene, acenaphthenequinone, 1-acenaphthenol, 3-methyl cholanthrene, phenanthrene, phenanthrene-9-carboxaldehyde, 9-phenanthrol, 2-acetyl phenanthrene, 9,10-dihydro-γ-oxo-phenanthrene butyric acid, 4H-cyclopenta [def] phenanthrene, phenanthrene quinone, 3,6-dimethyl phenanthrene, fluorene, 2-hydroxyfluorene, 2-bromofluorene, 2-aminofluorene, 2-fluorene carboxaldehyde, 2-acetylfluorene, 2-acetamidofluorene, 2-(dimethylamino) fluorene, 1-methylfluorene, methyl-1-fluorene carboxylate, 1-fluorene carboxylic acid, 1-fluorene carboxylic acid, 9-hydroxyfluorene, 9-fluorene carboxylic acid, 9-fluoreneacetic acid, 9-fluorene methanol, 9-phenyl fluorene, 9-fluorene carboxylic acid, 9-fluoreneacetic acid, 9-fluorene methanol, 9-phenyl fluorene, fluoranthene, 2,3-benzo fluorene, 9-hydroxy-9-fluorene carboxylic acid, 9-hydroxy-1-fluorene carboxylic acid, 1-amino-7-nitrofluorene, 2,7-diamino fluorene, 2-amino-7-bromofluorene, 2,7-dibromofluorene, 2-bromo-7-nitrofluorene, 2,7-dinitrofluorene, 2-acetamido-7-nitrofluorene monohydrate, 2-amino-1,3-dibromofluorene, 3,7-dinitro-2-methoxyfluorene, 3,7-diamino-2-methoxyfluorene, 7,9-dibromo-2-nitrofluorene, 2-amino-3-bromo-9-hydroxyfluorene, xanthene, 9-hydroxy xanthene, xanthene-9-carboxylic acid, 9-chloro-9-phenylxanthene, xanthone, thioxanthen-9-one, dibenzosuberane, dibenzosuberenol, dibenzosuberenone, dibenzosuberol, dibenzosuberone, 10,11-dibromo dibenzosuberone, pyrene, 1-pyrene carboxaldehyde, 1-aminopyrene, 1-acetamidopyrene, 1,2,3,6,7,8-hexahydropyrene, 1-pyrenebutyric acid, γ-oxo-1-pyrenebutyric acid, 1-nitropyrene, 9,10-dihydrobenzo[a]pyren-7(8H)-one, chrysene, 6-amino chrysene, perylene, 1,2,3,6,7,8,11,12-octahydrobenzo[e]pyren-9(10H)-one, rubrene, decacyclene, and mixtures thereof. 
     
     
       17. A process according to claim 1 wherein the additive contained in the image receiving coating on the substrate is selected from the group consisting of camphor carboxylic acid, acenaphthenequinone, 1,1,4,4-tetraphenyl-1,3-butadiene, paracyclophane, methyl-1-fluorene carboxylate, 10-chloro-9-anthracene methanol, 2-naphthalene methanol, cis-5-norbornene-endo-2,3-dicarboxylic anhydride, dibenzosuberenone, 10-methylanthracene-9-carboxaldehyde, and mixtures thereof. 
     
     
       18. A process according to claim 1 wherein the image receiving coating is situated on the substrate. 
     
     
       19. A process according to claim 1 wherein an electroconductive layer is situated between the substrate and the image receiving coating. 
     
     
       20. A process according to claim 19 wherein the electroconductive layer comprises a material of the formula ##STR12## wherein n is a number of from about 10 to about 100, R is hydrogen or methyl, R 1  is hydrogen, an alkyl group, or an aryl group, and R 2  is N+(CH 3 ) 3  X - , wherein X is an anion, and the degree of quaternization is from about 1 to about 100 percent. 
     
     
       21. A process according to claim 19 wherein the electroconductive layer comprises a polymethyl acrylate trimethyl ammonium chloride latex. 
     
     
       22. A process according to claim 1 wherein the recording sheet consists essentially of (a) a substrate; (b) an image receiving coating which comprises (i) a binder selected from the group consisting of (A) copolymers of styrene and at least one other monomer; (B) copolymers of acrylic monomers and at least one other monomer; and (C) mixtures thereof; and (ii) an additive having a melting point of more than about 65° C. and a boiling point of more than about 150° C. and selected from the group consisting of (A) norbornane compounds; (B) phenyl compounds; and (C) mixtures thereof; (c) an optional filler; (d) an optional antistatic agent; (e) an optional biocide; and (f) an optional electroconductive layer situated between the substrate and the image receiving coating. 
     
     
       23. A recording sheet which comprises (a) a substrate; (b) an image receiving coating which comprises (i) a binder selected from the group consisting of (A) copolymers of styrene and at least one other monomer; (B) copolymers of acrylic monomers and at least one other monomer; and (C) mixtures thereof; and (ii) an additive having a melting point of more than about 65° C. and a boiling point of more than about 150° C. and selected from the group consisting of (A) norbornane compounds; (B) phenyl compounds; and (C) mixtures thereof; (c) an optional filler; (d) an optional antistatic agent; and (e) an optional biocide. 
     
     
       24. A recording sheet which consists essentially of (a) a substrate; (b) an image receiving coating which consists essentially of (i) a binder selected from the group consisting of (A) copolymers of styrene and at least one other monomer; (B) copolymers of acrylic monomers and at least one other monomer; and (C) mixtures thereof; and (ii) an additive having a melting point of more than about 65° C. and a boiling point of more than about 150° C. and selected from the group consisting of (A) norbornane compounds; (B) phenyl compounds; and (C) mixtures thereof; (c) an optional filler; (d) an optional antistatic agent; (e) an optional biocide; and (f) an optional electroconductive layer situated between the substrate and the image receiving coating.